When Steve starts acting like a spoiled brat during the holidays, Stan will take him to see his incarcerated Grandpa Jack, who details the story of how he once caught Minstrel Krampus (voiced by guest star Danny Glover from Lethal Weapon), a demon who punishes naughty children on Christmas. But when Steve's naughty ways escalate - as seen in the video below, which includes a musical number sung by Scott Grimes! - Stan will release Krampus in an attempt to straighten out Steve's attitude.

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Naturally, that won't go well once Krampus kidnaps him and it's up to Stan and Roger to get Steve back. Check out the exclusive first look at American Dad's holiday episode, arigin Sunday at 9:308:30c on Fox:

View original Exclusive Video: American Dad Gets Musical During the Ho, Ho, Ho-lidays at TVGuide.com

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